MOPED ARMY

that is not true. leave your exhaust alone. Whatever problem you are having is probably not with the carb. Check you spark and belt and such.

Commonly wrong in regards to Motobecanes.

Because their exhausts aren't restrictive like other bikes; they run fine as is even on kits.

you should be running that shorty 15mm intake with the delorto instead. the bendy intake makes the float act all weird when the motor variates.

i just finaly got my moby running on this setup. 34mph with zero port work.

aaaaah

single unedited paragraph hurts the eyes

I am a jet driller. I have no idea the exact number, but I would estimate it to be in the 60's

clogged exhaust/ports?

is it possible he fucked up his port job? not criticizing your work, but hey it can happen if you cut the wrong places.

i ran my moby with the bendy intake and a $15 chinese carb and it did 35 easy

the throttle slide doesnt open up fully? before you go hacking away just make sure your cable is tensioned properly.

fuel filters are key. most carbs have them built in, but they are decent at best. they usually consist of tiny pieces of mesh wirejust after the fuel inlet. definitely install a fuel filter, even though i dont think that is what your problem is here.

oh gotcha, the porting and cleanup was done to the intake manfold itself. yea, no harm done there i would assume.

On intakes, the conventional wisdom is that rougher is better than smooth. I would be looking at the port map of your cylinder as it compare's to the map of the cylinder on your friends faster bike.

like I said i'd refrain from using the dremel. think about it, assuming your bike is using all original equipment, at least in the carb, and throttle assy, and nothing has been damaged, there should be no reason to have to modify anything.

if you see something that has clearly been damaged/misplaced, then go ahead and use the dremel. but before you do that just exhaust all your options. When you say "good tension"... i'd say tighten more. that will get your throttle slide up higher, all the way open. granted it wont drop as low, but then it may drop just enough. try everything before you modify. also i dont know if youre doing this or not, but generally you can leave your carb off as you make adjustments to your throttle. that way its easier to see in ane make sure all is good. take it off the manifold, and make sure you keep tension on the housing and you can leave it off as you troubleshoot. saves time.

the reason im beating this to death is that more than once i've seen something that I thought was defective, or didnt fit right or something. So i take the dremel to it, jerry rig it, and then 2 days later I find out what was REALLY wrong with it. By now I've permanently destroyed or disfigured whatever the part was and made it so it is no longer compatible with its intended assembly. very frustrating.

i looked at the wiki article about modifying the throttle assembly. Steve, i will take your advice and definitely check that the tension is correct. yet it said that is common to have this problem since the old carb only needs 13 mm of cable to fully open while the 15/15 needs about 16mm. it makes sense, it is in fact 3 mm more in diameter. guys, also remember this started as a B spec moped.bert, was your a B spec too? do you hve 35 solid mph?

large bendy is doubfully the problem, swap back and find out for sure, eliminate the variables.

"

Gabe, I'm not sure what spec I have - how can I tell?

the top of my cylinder has a J stamped on it though. I assume that is just the matching of the psiton to the jug.

I haven't GPS'd the speed, but just using the Speedo it goes over 30 on the flat.